Large objects do not require special handling anymore when they are freed.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 0da371e9d5ff85b85638c33275978f1bc422b839..c29224fffb68a5b8329ed28579ae737f6d75678e 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -6668,35 +6668,6 @@ void Heap::FreeQueuedChunks() {
   for (chunk = chunks_queued_for_free_; chunk != NULL; chunk = next) {
     next = chunk->next_chunk();
     chunk->SetFlag(MemoryChunk::ABOUT_TO_BE_FREED);
-
-    if (chunk->owner()->identity() == LO_SPACE) {
-      // StoreBuffer::Filter relies on MemoryChunk::FromAnyPointerAddress.
-      // If FromAnyPointerAddress encounters a slot that belongs to a large
-      // chunk queued for deletion it will fail to find the chunk because
-      // it try to perform a search in the list of pages owned by of the large
-      // object space and queued chunks were detached from that list.
-      // To work around this we split large chunk into normal kPageSize aligned
-      // pieces and initialize size, owner and flags field of every piece.
-      // If FromAnyPointerAddress encounters a slot that belongs to one of
-      // these smaller pieces it will treat it as a slot on a normal Page.
-      Address chunk_end = chunk->address() + chunk->size();
-      MemoryChunk* inner =
-          MemoryChunk::FromAddress(chunk->address() + Page::kPageSize);
-      MemoryChunk* inner_last = MemoryChunk::FromAddress(chunk_end - 1);
-      while (inner <= inner_last) {
-        // Size of a large chunk is always a multiple of
-        // OS::AllocateAlignment() so there is always
-        // enough space for a fake MemoryChunk header.
-        Address area_end = Min(inner->address() + Page::kPageSize, chunk_end);
-        // Guard against overflow.
-        if (area_end < inner->address()) area_end = chunk_end;
-        inner->SetArea(inner->address(), area_end);
-        inner->set_size(Page::kPageSize);
-        inner->set_owner(lo_space());
-        inner->SetFlag(MemoryChunk::ABOUT_TO_BE_FREED);
-        inner = MemoryChunk::FromAddress(inner->address() + Page::kPageSize);
-      }
-    }
   }
   isolate_->heap()->store_buffer()->Compact();
   isolate_->heap()->store_buffer()->Filter(MemoryChunk::ABOUT_TO_BE_FREED);